How to suck less in PVP? (Beginner)

After looking around a bit on these boards, I can see that most of the PVP population either knows the system inside and out, or are entirely clueless. I personally reside in the latter of the two. I have a lvl 32(ish) life wizard and mediocre gear compared to the stuff I see in the arena. I'm at a loss as to how to make my strategy better, obtain the right gear, what to do when, etc. Any tips? Anything is appreciated :)